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AWS BVAu-7 vs. AZ91C Magnesium

AWS BVAu-7 belongs to the otherwise unclassified metals classification, while AZ91C magnesium belongs to the magnesium alloys. There are 15 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is AWS BVAu-7 and the bottom bar is AZ91C magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 130
46
Poisson's Ratio 0.38
0.29
Shear Modulus, GPa 45
18
Tensile Strength: Ultimate (UTS), MPa 200
170 to 270

Thermal Properties

Latent Heat of Fusion, J/g 140
350
Melting Completion (Liquidus), °C 1120
600
Melting Onset (Solidus), °C 1100
470
Specific Heat Capacity, J/kg-K 240
990
Thermal Expansion, µm/m-K 13
26

Otherwise Unclassified Properties

Density, g/cm3 15
1.7

Common Calculations

Stiffness to Weight: Axial, points 4.7
15
Stiffness to Weight: Bending, points 11
69
Strength to Weight: Axial, points 3.7
27 to 43
Strength to Weight: Bending, points 5.1
39 to 53
Thermal Shock Resistance, points 8.9
9.9 to 16

Alloy Composition

Aluminum (Al), % 0
8.1 to 9.3
Cadmium (Cd), % 0 to 0.0010
0
Carbon (C), % 0 to 0.0050
0
Cobalt (Co), % 0 to 0.060
0
Copper (Cu), % 0
0 to 0.1
Gold (Au), % 49.5 to 50.5
0
Lead (Pb), % 0 to 0.0020
0
Magnesium (Mg), % 0
88.6 to 91.4
Manganese (Mn), % 0
0.13 to 0.35
Nickel (Ni), % 24.5 to 25.5
0 to 0.010
Palladium (Pd), % 23.9 to 26
0
Phosphorus (P), % 0 to 0.0020
0
Silicon (Si), % 0
0 to 0.3
Zinc (Zn), % 0 to 0.0010
0.4 to 1.0
Residuals, % 0
0 to 0.3